<template>
  <div class="search-container">
    <!-- 搜索栏 -->
    <form class="search-form" action="/">
      <van-search
        v-model="searchText"
        show-action
        placeholder="请输入搜索关键词"
        background="#3296fa"
        @search="onSearch"
        @cancel="onCancel"
        @focus="isResultShow = false"
      />
    </form>
    <!-- 搜索栏 -->

    <!-- 搜索结果 -->
    <SearchResult v-if="isResultShow" :search-text="searchText" />
    <!-- 搜索结果 -->

    <!-- 联想建议 -->
    <SearchSuggestion
      v-else-if="searchText"
      :search-text="searchText"
      @search="onSearch"
    />
    <!-- 联想建议 -->

    <!-- 搜索历史记录 -->
    <SearchHistory
      :search-histories="searchHistories"
      @search="onSearch"
      @clear-search-histories="searchHistories = []"
      v-else
    />
    <!-- 搜索历史记录 -->
  </div>
</template>

<script>
import SearchResult from "./components/search-result.vue";
import SearchHistory from "./components/search-history.vue";
import SearchSuggestion from "./components/search-suggestion.vue";
import { setItem, getItem } from '@/utils/storage'
export default {
  name: "SearchPage",
  components: {
    SearchResult,
    SearchHistory,
    SearchSuggestion
  },
  props: {},
  data() {
    return {
      searchText: "",
      isResultShow: false,
      searchHistories: getItem('search-histories') || [] //存储历史记录
    };
  },
  computed: {},
  watch: {
    searchHistories(val){
      // 同步到本地存储
      setItem('search-histories',val)
    }
  },
  created() {},
  methods: {
    onSearch(val) {
      this.searchText = val;
      //存储历史记录
      const index = this.searchHistories.indexOf(val);
      if (index !== -1) {
        this.searchHistories.splice(index, 1);
      }
      this.searchHistories.unshift(val);
      this.isResultShow = true;
    },
    onCancel() {
      this.$router.back();
    }
  }
};
</script>

<style scoped lang="less">
.search-container {
  padding-top: 108px;
  .van-search__action {
    color: #fff;
  }
  .search-form {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1;
  }
}
</style>
